From b9695c877abaf8a22d78ccb06f4c5be86de1f38d Mon Sep 17 00:00:00 2001
From: Syrus Akbary <me@syrusakbary.com>
Date: Tue, 31 May 2016 20:55:01 -0700
Subject: [PATCH] Fixed ClientIDMutation GraphQL type name. Fixed #148

---
 graphene/relay/tests/test_types.py | 34 ++++++++++++++++++++++++++++++
 graphene/relay/types.py            |  2 ++
 2 files changed, 36 insertions(+)

diff --git a/graphene/relay/tests/test_types.py b/graphene/relay/tests/test_types.py
index ff510cab..5b1dc6f7 100644
--- a/graphene/relay/tests/test_types.py
+++ b/graphene/relay/tests/test_types.py
@@ -66,3 +66,37 @@ def test_node_connection_should_have_edge():
     edges_type = connection_fields['edges'].type
     assert isinstance(edges_type, GraphQLList)
     assert edges_type.of_type == schema.T(edge)
+
+
+def test_client_mutation_id():
+    class RemoveWidget(relay.ClientIDMutation):
+
+        class Input:
+            id = graphene.String(required=True)
+
+        deletedWidgetID = graphene.String()
+
+        @classmethod
+        def mutate_and_get_payload(cls, input, info):
+            pass
+
+    graphql_type = schema.T(RemoveWidget)
+    assert graphql_type.name == 'RemoveWidgetPayload'
+
+
+def test_client_mutation_id_with_name():
+    class RemoveWidget(relay.ClientIDMutation):
+        class Meta:
+            type_name = 'RemoveWidgetCustomPayload'
+
+        class Input:
+            id = graphene.String(required=True)
+
+        deletedWidgetID = graphene.String()
+
+        @classmethod
+        def mutate_and_get_payload(cls, input, info):
+            pass
+
+    graphql_type = schema.T(RemoveWidget)
+    assert graphql_type.name == 'RemoveWidgetCustomPayload'
diff --git a/graphene/relay/types.py b/graphene/relay/types.py
index 2e0391ed..3ab55770 100644
--- a/graphene/relay/types.py
+++ b/graphene/relay/types.py
@@ -176,6 +176,8 @@ class RelayMutationMeta(MutationMeta):
         if not cls._meta.abstract:
             assert hasattr(
                 cls, 'mutate_and_get_payload'), 'You have to implement mutate_and_get_payload'
+        if 'type_name' not in cls._meta.original_attrs:
+            cls._meta.type_name = '{}Payload'.format(cls.__name__)
         return cls
 
     def construct_arguments(cls, items):